Switch-plug.



H. R. SARGENT.

SWITCH PLUG.

APPLICATION FILED JAN. a1, 1913.

1,094,479, Patented Apr. 28, 1914.

Fig. l

Inventor: Howard R. Sargent,

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UNITED STATES PATENT OFFICE.

HOWARD It. SARGENT, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A. CORPQBATION OF NEW YORK.

SWITCH-PLUG.

Application filed January 31, 1913. Serial 110. 745,392.

T 0 all whom it may concern:

Be it known that I, HOWARD It. SARGENT, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Switch-Plugs, of which the following is a specification.

My invention has reference to a switch plug and has for its object an improvement in a device of this character.

Attaching plugs provided with conductors extending therefrom to suitable translating devices and having projecting fingers adapted to engage terminals in a stationary socket, have hitherto been used. 'VVith such devices, however, in order to break the circuit to the translating device, it has hitherto been necessary to provide the translating device with a manually operated switch. In many instances, however, the translating device is not or cannot be provided with such a switch; moreover, when the translating device is provided with a switch it is often undesirable to disconnectthe circuit at-the translating device, as for instance when it becomes necessary to repair the device.

My invention overcomes'these difliculties by providinga novel form of switch plug, which is provided with a manually operated switch for connecting and disconnecting the circuit to the translating device.

For a fuller understanding of my invention, reference may be had to the accompanying drawings, in which Figure l is aside elevation of the'switch plug embodied in my invention secured to an attaching plug, Fig. 2 is a front elevation of the switch plug with the cap removed; Fig.3 is a skeleton perspective view of the same; Fig. 4'is a front elevation of the attaching plug; Fig. 5 is a side elevation of the switch plug; and Fig. 6 is a rear end elevation of theswitch plug.

Referring-to the drawings, the attaching plug, with which my novelform of switch plug cooperates, made of insulating material, such as orcelain, with a neck 2 which is surrounde by a screw-threaded metallic shell 3, and provided at itsend with a center contact terminal 4, the shell 3 and the contact terminal 4 being connected to clip terminals 5 and 6 (Fig. 4), as is well understood in the art and as shown, for example, in patent to Luther,

is composed of a body 1 l1\; 1.(-)955,465, which was issued on April 19,

The switch plug comprises a base 7 made of suitable insulating material, such as porcelaln, which is provided at its rear end with a recess 8 extending below the back face of the plug. Two contact fingers 9 and 10 are provided with cars at their inner ends, by which they are secured to the base of the switch plug at the bottom of the recess 8 and at opposite sides thereof. Two contact plates 11 and 12 are located at diametrically opposite points on the front face of the base 7. The contact finger 10 is electrically connected to the contact plate 11 by a fiat strip 13, dne end of which lies beneath the base flange of the contact finger 10, the strip itself lying in the bottom of the recess 8 and extending around to. a point immediately opposite the contact plate 11, to which the strip is secured and electrically connected by a screw- 14. The switch plug is provided with two'binding posts, one of which, 15, is secured directly to the ear of the contact finger 9 andthe other, 16, to the contact plate 12'. To these binding posts two conductors '17 are". connected, which are led into the switch plug through an angled which extends through the side '7 and then back to the recess in F1gs. 2, 3 and 6, the recess 8 opening 18 of the base 8, as shown being of such a house these conductors. One of the conductors, is connected to the binding post 15, while the other is led back through an opening 19 to the front of theswitch plug and connectedto the binding post 16'. A manually operated snap action rotary switch, comprising a shaft 20, on which is carried a switch blade 21, is mounted upon the base 7, the switch blade being adapted to connect and disconnect the contact plates 11 and 12. A handle 22 of usual construction is mounted on the end of the shaft 20. The usual cap 23 is provided for housing the switch.

It will be readily seen that by connecting and disconnecting the contact plates '11 and 12 by. means of the switch blade 21, the circuit to one of the conductors and thus to the translating device is made or broken at the switch plug. It will also be noted that by reason of the branch wires-17 passing through the angular opening 18 together and one of them 'be- Patented Apr. 28, 1914..

'85 depth as to comfortably.

ing threaded back through the hole 19 where it is bent over upon switch plate 12, any strain exerted upon the branch wires will be distributed upon the rigid base 7 and the binding posts 15 and 16 relieved thereof.

In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

lVhat I claim as new and desire to secure by Letters Patent of the United States, isv

1. I11 a switch plug comprising a base, a pair of contact fingers projecting from said base and adapted to engage corresponding contact terminals in an attaching plug, a pair of' binding posts mounted upon *said base, and a rotary snap switch co-axially mounted upon said base for making and breaking circuit between a binding post and a contact finger.

2. The combination of an attaching plug provided with a pair of contact terminals, of a switch plug provided with a pair of contact fingers adapted to engage said terminals, a pair of binding posts to which conductors leading from the switch plug may be connected, electrical connections between each of said binding posts and corresponding contact fingers, and a rotary sna'p switch mounted co-axially of the plug for making and breaking the circuit be tween one or both of said binding posts and the corresponding fingers.

3. In a switch plu a base having an opening at one side oientrance of con ductor leads, a pair of contact fingers projecting from the rear of said base, a pair of switch contacts secured to the front of said base, a rotary snap switch carried by the base for connecting one of said contact terminals to and disconnecting it from one of the switch contacts, and a pair of bind ing posts connected to the second contact finger and the second switch contact respectively and adapted to receive corresponding conductors leading through the base opening. 4;. In a switch plug comprising a base having an opening at one side for entrance of conductor leads, a pair of contact fingers projecting from the rear of said base, a pair of contact plates carried on the front of said base, one. of which is electrically connected to one of said fingers, binding posts connected to the second contact finger and to the second contact plate respectively which are adapted to receive conductors extending through the base opening, and a manually-operated switch carried by the base for connecting and disconnecting said contact clips.

5. In a switch plug, a base provided with a recess at its rear, a pair of contact fingers projecting therefrom, a pair of contact plates carried by the front of said base, one of which is electrically connected to one of said fingers, and a manually-operated switch blade carried by said base for connecting and disconnecting said contact plates, binding posts electrically connected to the second contact finger and to the second contact plate respectively said base being provided with an opening extending from said recess to the exterior of the base for the accommodation of conductors .leading from the switch block and with an openin extending from said recess to the front ol the base adjacent said second contact clip for the accommodation of one of the conductors.

In witness whereof, I have hereunto set my hand this 30th day of January, 1913.

HOWARD R. SARGENT. Witnesses:

BENJAMIN B. HULL, HELEN ORFORD. 

